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Linksys router to switch problem

I have a Linksys WAG54GS ADSL router with wifi and 4 ethernet ports. This seems to be working OK.

I have attached to it a Linksys 8-port Workgroup switch. I have plugged the router cable into port number 1 (tried the "uplink port" but same result).

The problem arises when I attach PCs with cables of 5m length or greater. I lose connectivity (getting the dreaded 169.... ip addresses). PCs attached to the switch with short cables (1.5m / 2m) are absolutely fine.

When I plug the longer cables directly into the WAG54GS, I get my connections back.

Plug a cable from one of the 4 LAN ports on the Router into the 8 port switch. Connect the PCs to the 8 Port switch.

If that doesn't work, then make a drawing (using MS Paint or better) of exactly how you have everything connected and upload the image to this thread. Make sure you save the image as a JPG. Do NOT upload a BMP or TIFF. Ta.

Comment

Plug a cable from one of the 4 LAN ports on the Router into the 8 port switch. Connect the PCs to the 8 Port switch.

If that doesn't work, then make a drawing (using MS Paint or better) of exactly how you have everything connected and upload the image to this thread. Make sure you save the image as a JPG. Do NOT upload a BMP or TIFF. Ta.

That is exactly what I did. However, those with longer cables failed. They worked again, however, when plugging them back into the router.

Strangely enough, I now have connectivity back in the long cables, but one of the short ones is now failing!!

Aaarrrgghhhh!!

Thanks for the reply, but due to the randomness I am going to change the switch (I only bought it yesterday) on the assumption it is faulty.